[Graph] Ensure inclusive language

[flash1293]

Part of #71398

Renames blacklist to blocklist in code. The interface already used the "blocklist" term, this is just making the code consistent. I'm aware we use "deny-list" in other places, but as we went with "blocklist" already, IMHO it makes sense to just stick with it.

This also adds a migration to rename the similar named key in the saved object.

As a side effect this also renames another occurrence in the timelion docs.

[kibanamachine]

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• continuous-integration/kibana-ci/pull-request
• Commit: f46e492

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[kertal]

Code LGTM, thx for making Graph more inclusive 👍 , tested locally in Chrome, Firefox, blocking nodes works. Didn't test the migration, but looks good to me code wise.

[kertal]

Think I've also tested the upgrade, because looking at the ecommerce the demo data, the block list contains data:

[flash1293]

Thanks for testing @kertal I updated the sample data as well, so if you installed while on this PR, it wouldn't test the migration, but if you installed it earlier than this would indeed validate the migration worked.

[kertal]

Thanks for testing @kertal I updated the sample data as well, so if you installed while on this PR, it wouldn't test the migration, but if you installed it earlier than this would indeed validate the migration worked.

was installed before, so it was migrated